JP5629367B2 - Air conditioning and hot water supply system - Google Patents

Description

The present invention relates to a multi-heat source air-conditioning hot water supply system in which an air conditioning refrigerant circuit and a hot water supply refrigerant circuit are connected to each other via an intermediate heat exchanger so as to be able to exchange heat with each other to form a dual refrigeration cycle of an air conditioning cycle and a hot water supply cycle. about the system.

The refrigerant circuit for air conditioning and the refrigerant circuit for hot water supply are connected to each other through an intermediate heat exchanger so that heat can be exchanged, and this is a multi-heat source consisting of an air conditioning cycle capable of cooling operation and heating operation and a hot water supply cycle capable of hot water supply operation. An air-conditioning hot water supply system having an original refrigeration cycle is widely known (see, for example, Patent Documents 1 and 2).
Patent Document 1 includes a high-temperature cycle (hot water supply cycle) that performs high-temperature output and an intermediate-temperature cycle (air-conditioning cycle) that performs medium-temperature output or low-temperature output, and heat exchange is performed between the evaporator of the high-temperature cycle and the condenser of the intermediate-temperature cycle. A heat pump system configured to be possible is disclosed. According to the technique disclosed in Patent Document 1, it is possible to operate (exhaust heat recovery operation) so that the exhaust heat of the intermediate temperature cycle is effectively used in the high temperature cycle, and economical operation becomes possible.

  Patent Document 2 discloses an air conditioner that can perform an air conditioning operation, a hot water supply operation, a cold storage operation, an air conditioning hot water supply operation, and the like. According to the technique disclosed in Patent Document 2, each operation can be switched by providing a plurality of switching valves and expansion valves. According to the technique disclosed in Patent Document 2, each operation can be switched efficiently.

JP-A-4-32669 JP 2005-299935 A

However, in the heat pump system disclosed in Patent Document 1, the exhaust heat of the intermediate temperature cycle can be used as a heat source for the high temperature cycle only when the exhaust heat amount of the intermediate temperature cycle is larger than the endothermic amount of the high temperature cycle. In other words, the exhaust heat of the intermediate temperature cycle can be used as the heat source of the high temperature cycle only when the load of the intermediate temperature cycle (air conditioning load) is high, and the exhaust heat recovery operation can be executed.
For example, the air conditioning load for air conditioning operation for air conditioning a space with low internal heat generation, such as a space with high heat insulation performance or a space with few residents, or air conditioning operation with low outside air temperature such as at night may reduce the air conditioning load. In such a case, the load of the high temperature cycle (hot water supply load) may exceed the air conditioning load.
In the technique disclosed in Patent Document 1, there is a problem that in such a case, the high-temperature cycle cannot be operated as required only by the exhaust heat of the intermediate temperature cycle.

In addition, an air conditioner disclosed in Patent Document 2 includes a cascade condenser (intermediate heat exchanger) that recovers exhaust heat of a main cycle (air conditioning cycle), and an outdoor heat exchanger (heat source side heat for air conditioning) of the main cycle. Are connected in parallel, and the cascade condenser and the outdoor heat exchanger are operated at the same time, the exhaust heat of the main cycle is recovered by the cascade condenser, and the heat is transferred to the subcycle (hot water supply cycle) to be exhausted. It is configured to enable recovery operation.
In order to recover the exhaust heat of the main cycle, which is operated by cooling, with a cascade condenser and use it as a heat source for the sub-cycle, the necessary amount of heat from the exhaust heat of the main cycle with a large amount of heat is recovered with a cascade condenser, It is necessary to exhaust heat from the heat exchanger for exhaust heat outside the room. That is, it is necessary to suitably distribute the refrigerant that circulates including heat in the main cycle to the cascade condenser and the outdoor heat exchanger (heat exchanger for exhaust heat).
However, Patent Document 2 does not disclose a technique for suitably distributing the refrigerant to the cascade condenser and the outdoor heat exchanger in the main cycle.

The present invention, when the exhaust heat recovery operation, the refrigerant in the large cycle of heat, and the heat exchanger for exhaust heat recovery, to provide a suitably dispensable air-conditioning hot-water supply system to the heat exchanger for exhaust heat This is the issue.

In order to solve the above problems, the present invention provides an air conditioning refrigerant circuit in which an air conditioning refrigerant circulates to form an air conditioning cycle, a hot water supply refrigerant circuit in which a hot water supply refrigerant circulates to form a hot water supply cycle, a control device, And in parallel with the air-conditioning heat source side heat exchanger for exchanging heat between the air-conditioning refrigerant and the atmosphere in the air-conditioning refrigerant circuit, and between the hot-water supply refrigerant and the atmosphere in the hot-water supply refrigerant circuit The air-conditioning hot water supply system includes an intermediate heat exchanger that is connected in parallel with the hot water supply heat source side heat exchanger for exchanging heat between the air conditioning refrigerant and the hot water supply refrigerant. And an air conditioning refrigerant inflow adjusting means for adjusting an inflow amount of the air conditioning refrigerant to the heat source side heat exchanger or the intermediate heat exchanger during the cooling operation in the air conditioning cycle, and the air conditioning heat source. Of the side heat exchanger and the intermediate heat exchanger, an air conditioning heat exchanger outlet temperature measuring means for measuring one of the air conditioning heat exchanger outlet temperatures in which the inflow amount of the air conditioning refrigerant is adjusted during the cooling operation; The air conditioning refrigerant inflow adjusting means is an air conditioning refrigerant flow rate adjustment valve, and a flow path resistance of the air conditioning heat source side heat exchanger to the air conditioning refrigerant is the air conditioning of the intermediate heat exchanger. As a configuration in which the flow resistance to the refrigerant for cooling is smaller, the air conditioning refrigerant flow rate adjustment valve is used as a first air conditioning refrigerant inlet that serves as an inlet for the air conditioning refrigerant to the air conditioning heat source side heat exchanger during the cooling operation. In addition, the air conditioning The heat exchanger outlet temperature measuring means, provided in the vicinity of the first air conditioning refrigerant outlet as the outlet of the air conditioning refrigerant from the air-conditioning heat source side heat exchanger during the cooling operation, the control device, the air conditioning cycle When performing the cooling operation at the same time and the hot water supply operation in the hot water supply cycle at the same time, the air-conditioning heat radiation amount in the air-conditioning refrigerant circuit, the hot-water supply heat absorption amount in the hot-water supply refrigerant circuit, and the air-conditioning refrigerant circuit A target condensation temperature and a target evaporation temperature in the hot water supply refrigerant circuit are calculated, and when the air conditioning heat dissipation amount is larger than the hot water supply heat absorption amount, the hot water supply refrigerant shut-off means supplies the heat supply side heat exchanger to the heat source side heat exchanger. thereby blocking the flow of the hot water supply refrigerant, by adjusting the valve opening degree of the air conditioning refrigerant flow regulating valve based on the air-conditioning heat exchanger outlet temperature, the air to the air-conditioning heat source side heat exchanger And adjusting the flow amount of use coolant.

According to the present invention, when the exhaust heat recovery operation, the refrigerant in the large cycle of heat, and the heat exchanger for exhaust heat recovery, can provide a suitably dispensable air-conditioning hot-water supply system to the heat exchanger for exhaust heat .

It is a distribution diagram of an air-conditioning hot-water supply system concerning this embodiment. It is a figure which shows the state of the operation mode of an air conditioning hot-water supply system. It is a figure which shows the air-conditioning hot-water supply system which carries out exhaust heat recovery driving | operation in the 1st driving | running state. It is a figure which shows the air-conditioning hot-water supply system which performs waste heat recovery driving | operation in a 2nd driving | running state. It is a figure which shows the air-conditioning hot-water supply system which performs waste heat recovery driving | operation in a 3rd driving | running state. It is a flowchart which shows the procedure of an exhaust heat recovery driving | operation. It is a flowchart which shows the procedure of the waste heat recovery driving | operation in a 1st driving | running state. It is a flowchart which shows the procedure of the waste heat recovery driving | operation in a 2nd driving | running state. It is a flowchart which shows the procedure of the waste heat recovery driving | operation in a 3rd driving | running state. It is a figure which shows the air-conditioning hot-water supply system which concerns on embodiment provided with the refrigerant | coolant flow rate adjustment valve in the intermediate heat exchanger.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

As shown in FIG. 1, an air conditioning and hot water supply system 100 according to the present embodiment includes an air conditioning refrigerant circuit 5 that drives an air conditioning compressor 21 to switch between a cooling operation and a heating operation, and a hot water supply compressor. The hot water supply refrigerant circuit 6 that drives the hot water supply 41 by driving 41, the air conditioning refrigerant circuit 5 that exchanges heat with the air conditioning cold / hot water circulation circuit 8 that performs the air conditioning of the interior of the house 60, the hot water supply refrigerant circuit 6 and the heat A hot water supply passage 9 for supplying hot water by replacement and a control device 1a for controlling each operation are provided. The air conditioning refrigerant circuit 5 and the hot water supply refrigerant circuit 6 are thermally connected via an intermediate heat exchanger 23 that is a heat exchanger for exhaust heat recovery, so that the air conditioning cycle and the hot water supply cycle dual refrigeration cycle Is a formed system.
Hereinafter, the cooling operation and the heating operation indicate a cooling operation and a heating operation of an air conditioning cycle including the air conditioning refrigerant circuit 5. The hot water supply operation refers to a hot water supply operation of a hot water supply cycle including the hot water supply refrigerant circuit 6.

This air conditioning and hot water supply system 100 includes a heat pump unit 1 disposed outside a house 60 and an indoor unit 2 disposed indoors.
The heat pump unit 1 includes an air conditioning refrigerant circuit 5, a hot water supply refrigerant circuit 6, an air conditioning cold / hot water circulation circuit 8, a hot water supply passage 9, and a control device 1a.
The indoor unit 2 includes an indoor heat exchanger 61 that exchanges heat between the indoor air of the house 60 and the cold / hot water flowing through the cold / hot water circulation circuit 8 for air conditioning.

  The air-conditioning refrigerant circuit 5 is a circuit in which a refrigeration cycle (air-conditioning cycle) is formed by circulating air-conditioning refrigerant (hereinafter referred to as air-conditioning refrigerant). The air-conditioning compressor 21 compresses the air-conditioning refrigerant, and air conditioning. Heat exchange between the four-way valve (air conditioning flow path switching valve) 22 for switching the refrigerant flow path and the refrigerant circulating in the hot water supply refrigerant circuit 6 (hereinafter referred to as hot water supply refrigerant) and the air conditioning refrigerant. Between the air conditioner refrigerant tank 26, the air conditioning refrigerant tank 26, the air conditioning expansion valve 27 that decompresses the air conditioning refrigerant, and the air conditioning cold / hot water circulating in the air conditioning cold / hot water circulation circuit 8 and the air conditioning refrigerant circulating in the air conditioning refrigerant circuit 5. Heat exchange between the air blown by the outdoor fan 25 for air conditioning and the air conditioning refrigerant is exchanged with the air conditioning refrigerant main circuit 5a in which the air conditioning use-side heat exchanger 28 that performs heat exchange at the refrigerant pipe is connected annularly. Heat source side for air conditioning Exchanger 24 is in the connected configuration.

  In FIG. 1, the air-conditioning refrigerant circulating in the air-conditioning refrigerant circuit 5 and the air-conditioning cold / hot water circulating in the air-conditioning cold / hot water circulation circuit 8 exchange heat, and the air-conditioning cold / hot water and the indoor air of the house 60 are indoors. Although the heat exchanger 61 is configured to exchange heat, the air-conditioning cold / hot water circulation circuit 8 may not be provided, and the air-conditioning refrigerant and the indoor air of the house 60 may directly exchange heat.

The air conditioning refrigerant circuit 5 will be described in more detail. The air conditioning heat source side heat exchanger 24 is arranged between the intermediate heat exchanger 23 and the air conditioning refrigerant main circuit 5a at a position between the four-way valve 22 and the air conditioning expansion valve 27. The first control valve 35c and the second control valve 35d for controlling the flow rate of the air-conditioning refrigerant are respectively provided at the inlet and outlet of the air-conditioning heat source side heat exchanger 24 so as to be connected in parallel. Yes.
Reference numeral 24a of the air-conditioning heat source side heat exchanger 24 is an air-conditioning refrigerant inlet (first air-conditioning refrigerant inlet) serving as an inlet of the air-conditioning refrigerant during cooling operation, and reference numeral 24b is an outlet of the air-conditioning refrigerant during cooling operation The air conditioning refrigerant outlet (first air conditioning refrigerant outlet) is shown.
As will be described later, in the air conditioning and hot water supply system 100 according to the present embodiment, the first control valve 35c provided on the air conditioning refrigerant inlet 24a side of the air conditioning heat source side heat exchanger 24 is an air conditioning heat source side heat exchanger. Since it is used as an air-conditioning refrigerant inflow amount adjusting means for adjusting the inflow amount of the air-conditioning refrigerant to 24, it is hereinafter referred to as an air-conditioning refrigerant flow rate adjustment valve 35c.
Incidentally, at the time of heating operation in the air conditioning cycle, the air conditioning refrigerant outlet / inlet in the air conditioning heat source side heat exchanger 24 is reversed.
Specifically, during the heating operation in the air conditioning cycle, in the air conditioning heat source side heat exchanger 24, the air conditioning refrigerant outlet 24b serves as an air conditioning refrigerant inlet, and the air conditioning refrigerant inlet 24a serves as an air conditioning refrigerant outlet. It becomes.
Note that the air conditioning refrigerant circulating in the air conditioning refrigerant circuit 5, R410a, R134a, HFO1234yf, HFO1234ze, CO 2, the refrigerant suitable for use condition from the propane used.

Next, each device provided in the above-described air conditioning refrigerant circuit 5 will be described.
The air conditioning compressor 21 is preferably a variable capacity compressor capable of capacity control. As such a compressor, a piston type, a rotary type, a scroll type, a screw type, or a centrifugal type can be adopted. In this embodiment, the air-conditioning compressor 21 is a scroll type compressor, and capacity control is possible by inverter control, and the rotation speed is variable from low speed to high speed.

Although not shown in the drawing, the air-conditioning use-side heat exchanger 28 is an air-conditioning heat transfer pipe through which air-conditioning refrigerant flows and an air-conditioning cold / hot water heat-transfer pipe through which an antifreeze liquid such as water or brine (a heat transfer medium on the air-conditioning use side) flows. And a plate type heat exchanger can be used.
The air conditioning refrigerant tank 26 functions as a liquid receiver that adjusts the circulation amount of the air conditioning refrigerant that is changed by switching the flow path of the air conditioning refrigerant circuit 5.
The air conditioning expansion valve 27 functions as a pressure reducing device and has a function of reducing the pressure of the air conditioning refrigerant to a predetermined pressure by adjusting the valve opening.

  The air-conditioning cold / hot water circulation circuit 8 is a circuit through which water (heat transfer medium on the air-conditioning use side) that exchanges heat with the refrigerant circulating in the air-conditioning refrigerant circuit 5 circulates. The indoor heat exchanger 61 installed in the house 60 is connected by an air conditioning cold / hot water pipe 55a having an opening / closing valve 54a, and the indoor heat exchanger 61 and the four-way valve 53 are connected by an air conditioning cold / hot water having an opening / closing valve 54b. It is a circuit formed in an annular shape by connecting with a pipe 55b and connecting the four-way valve 53 and the air-conditioning use side heat exchanger 28 with an air-conditioning cold / hot water pipe 55c. The water (cold water or hot water) flowing through the cold / hot water circulation circuit 8 for air conditioning exchanges heat with the indoor air of the house 60 via the indoor heat exchanger 61 to cool or heat the house 60. Here, a brine such as ethylene glycol may be used in place of water as the heat transfer medium on the air conditioning use side that flows in the cold / hot water circulation circuit 8 for air conditioning. When brine is used, it can be applied even in cold regions.

  In the following description, the term “cold water” or “warm water” is used as the water flowing through the air-conditioning cold / hot water circulation circuit 8, and “cold water” refers to water flowing through the air-conditioning cold / hot water circulation circuit 8 during cooling operation. “Warm water” indicates water flowing through the cold / hot water circulation circuit 8 for air conditioning during heating operation.

  The hot water supply refrigerant circuit 6 is a circuit in which a refrigeration cycle (hot water supply cycle) is formed by circulating hot water supply refrigerant, and water flowing through the hot water supply passage 9 and the hot water supply compressor 41 that compresses the hot water supply refrigerant. (Hot water supply) and a hot water supply side heat exchanger 42 that exchanges heat between the hot water supply refrigerant, a hot water supply refrigerant tank 46 that functions as a liquid receiver for adjusting the amount of the hot water supply refrigerant, and depressurizing the hot water supply refrigerant. A hot water supply expansion valve 43 and a hot water supply refrigerant main circuit 6a in which an intermediate heat exchanger 23 for exchanging heat between the air conditioning refrigerant circulating in the air conditioning refrigerant circuit 5 and the hot water supply refrigerant is connected in an annular shape by a refrigerant pipe. A hot water supply heat source side heat exchanger 44 that performs heat exchange between the air blown by the hot water supply outdoor fan 45 and the hot water supply refrigerant to exhaust heat is connected.

The hot water supply refrigerant circuit 6 will be described in more detail. The hot water supply heat source side heat exchanger 44 is located at a position between the hot water supply expansion valve 43 and the hot water supply compressor 41 of the hot water supply refrigerant main circuit 6a. The third control valve 49a and the fourth control valve 49c for controlling the flow rate of the hot water supply refrigerant are arranged at the entrance and exit of the hot water supply heat source side heat exchanger 44, respectively. ing.
In the hot water supply heat source side heat exchanger 44, reference numeral 44a indicates a hot water supply refrigerant inlet (first hot water supply refrigerant inlet), and reference numeral 44b indicates a hot water supply refrigerant outlet (first hot water supply refrigerant outlet).
As will be described later, in the air conditioning and hot water supply system 100 according to the present embodiment, the third control valve 49a provided on the hot water supply refrigerant inlet 44a side of the hot water supply heat source side heat exchanger 44 is connected to the hot water supply heat source side heat exchanger 44. Since it is used as a hot water supply refrigerant inflow amount adjusting means for adjusting the inflow amount of the hot water supply refrigerant, it is hereinafter referred to as a hot water supply refrigerant flow rate adjustment valve 49a.
Note that the hot water supply refrigerant circulating in the hot water supply refrigerant circuit 6, R410a, R134a, HFO1234yf, HFO1234ze, CO 2, the refrigerant suitable for use condition from the propane used.

Next, each device provided in the hot water supply refrigerant circuit 6 will be described.
The hot water supply compressor 41 is capable of capacity control by inverter control similarly to the air conditioning compressor 21 and preferably has a variable rotational speed from a low speed to a high speed.
Although not shown, the hot water use side heat exchanger 42 is in thermal contact with a hot water supply water heat transfer pipe through which water supplied to the hot water supply passage 9 flows and a hot water supply refrigerant heat transfer pipe through which hot water supply refrigerant flows. Those configured in this way are available.
The hot water supply expansion valve 43 can reduce the pressure of the hot water supply refrigerant to a predetermined pressure by adjusting the valve opening.

In addition, opening / closing valves 35a and 35b are provided at the entrance and exit of the intermediate heat exchanger 23 of the air conditioning refrigerant circuit 5, respectively.
Reference numeral 23a of the intermediate heat exchanger 23 is an air conditioning refrigerant inlet (second air conditioning refrigerant inlet) that serves as an air conditioning refrigerant inlet during the cooling operation, and reference numeral 23b is an air conditioning refrigerant outlet during the cooling operation. The air-conditioning refrigerant outlet (second air-conditioning refrigerant outlet) is shown.
In the intermediate heat exchanger 23, an on-off valve 49b is disposed at a hot water supply refrigerant inlet (second hot water supply refrigerant inlet) 23c that serves as an inlet for hot water supply refrigerant during hot water supply operation, and serves as an outlet for hot water supply refrigerant. An on-off valve 49d is provided at the refrigerant outlet (second hot water supply refrigerant outlet) 23d.
Incidentally, at the time of the heating operation in the air conditioning cycle, the inlet / outlet of the air conditioning refrigerant in the intermediate heat exchanger 23 is reversed.
Specifically, during the heating operation in the air conditioning cycle, in the intermediate heat exchanger 23, the cooling air conditioning refrigerant outlet 23b serves as an air conditioning refrigerant inlet, and the cooling air conditioning refrigerant inlet 23a serves as an air conditioning refrigerant outlet.
Further, the air conditioning refrigerant flow path of the intermediate heat exchanger 23 is desirably a flow path structure or path configuration that allows the hot water supply refrigerant circulating in the hot water supply refrigerant circuit 6 to absorb heat efficiently, so that the flow resistance is low. In some cases, the air-conditioning heat source side heat exchanger 24 becomes larger.
Similarly, it is desirable that the hot water supply refrigerant flow path of the intermediate heat exchanger 23 has a flow path structure or path configuration that allows the air conditioning refrigerant circulating in the air conditioning refrigerant circuit 5 to efficiently dissipate heat. However, it may be larger than the heat source side heat exchanger 44 for hot water supply.
For this reason, the heat source side heat exchanger 24 for air conditioning and the heat source side heat exchanger 44 for hot water supply have a configuration in which the refrigerant (air conditioning refrigerant, hot water supply refrigerant) is more easily distributed than the intermediate heat exchanger 23.

The hot water supply passage 9 is a passage through which water as a heat transfer medium on the use side for hot water supply circulates, and connects the water side inlet 42 a and the water supply port 78 of the use side heat exchanger 42 for hot water supply with a hot water supply pipe 72. The flow path is formed by connecting the water-side outlet 42 b of the hot-water supply-use heat exchanger 42 and the hot-water supply port 79 with a hot-water supply pipe 73. The hot water supply pipe 73 is provided with a hot water storage tank 70, and the water supplied from the water supply port 78 is heated by exchanging heat with the hot water supply refrigerant in the hot water supply use side heat exchanger 42, and becomes hot water. Hot water is stored in 70.
The hot water stored in the hot water storage tank 70 is supplied from the hot water supply port 79 to the hot water supply load side (tub, washroom, kitchen, etc.). A drain pipe 71 a and a drain valve 71 b are provided at the bottom of the hot water storage tank 70. The drain valve 71b is normally closed, and is opened based on a command from the control device 1a so that the hot water stored in the hot water storage tank 70 flows through the drain pipe 71a and is discharged to the outside. Composed. The hot water supply passage 9 is provided with a flow rate sensor (not shown) for detecting the flow rate of water or hot water.

The air conditioning and hot water supply system 100 includes a plurality of temperature sensors TH1 to TH23. Specifically, in order to measure the temperature of the water or hot water flowing through the hot water supply passage 9, the temperature sensor TH2 is provided at the water side inlet 42a of the hot water use side heat exchanger 42, and the temperature sensor TH1 is further provided at the water supply port 78. Each is equipped.
Further, in order to measure the temperature of the cold / hot water flowing through the air-conditioning cold / hot water circulation circuit 8, a temperature sensor TH4 is provided at the water inlet (heating-time water-side inlet 28a) of the air-conditioning use-side heat exchanger 28 during heating operation. A temperature sensor TH3 is provided at the water outlet (water heating side outlet 28b) of the air conditioning use-side heat exchanger 28 during heating operation, and a temperature sensor TH5 is provided at the refrigerant outlet 61b of the indoor heat exchanger 61. Reference numeral 61 a is a refrigerant inlet of the indoor heat exchanger 61.

  Further, in order to measure the temperature of the hot water supply refrigerant flowing through the hot water supply refrigerant circuit 6, temperature sensors TH 6 and TH 7 are respectively provided in the suction port 41 a and the discharge port 41 b of the hot water supply compressor 41, and the hot water supply expansion valve 43 A temperature sensor TH8 is provided at the outlet. Further, a temperature sensor TH9 is provided at the hot water supply refrigerant outlet 44b of the hot water supply heat source side heat exchanger 44, and a temperature sensor TH10 is provided at the hot water supply refrigerant outlet 23d of the intermediate heat exchanger 23, respectively.

  Further, in order to measure the temperature of the air conditioning refrigerant flowing through the air conditioning refrigerant circuit 5, temperature sensors TH 11 and TH 12 are respectively provided in the suction port 21 a and the discharge port 21 b of the air conditioning compressor 21, and the intermediate heat exchanger 23 The air conditioning refrigerant inlet 23a is provided with a temperature sensor TH13, and the air conditioning refrigerant outlet 23b is provided with a temperature sensor TH14. Further, the temperature sensor TH17 is provided at the outlet of the air conditioning expansion valve 27 during the cooling operation, the temperature sensor TH15 is provided at the cooling air conditioning refrigerant inlet 24a of the air conditioning heat source side heat exchanger 24, and the temperature sensor TH16 is provided at the cooling air conditioning refrigerant outlet 24b. The air conditioning refrigerant outlet 28d, which is the air conditioning refrigerant outlet of the air conditioning use-side heat exchanger 28 during the cooling operation, is provided with a temperature sensor TH18. Reference numeral 28c denotes a cooling air-conditioning refrigerant inlet that serves as an inlet of the air-conditioning refrigerant to the air-conditioning use-side heat exchanger 28 during the cooling operation.

  In the air conditioning and hot water supply system 100 according to the present embodiment, the temperature sensor TH19 that measures the outside air temperature, the temperature sensor TH20 that measures the indoor temperature of the house 60, and the temperature of the hot water stored in the hot water storage tank 70 are measured. A temperature sensor TH21 is also provided.

Further, the air conditioning compressor 21 is provided with a rotation speed detection sensor RA for detecting the rotation speed, and the hot water supply compressor 41 is provided with a rotation speed detection sensor RH for detecting the rotation speed.
The air conditioning expansion valve 27 is provided with a valve opening degree detection sensor PA for detecting the valve opening degree, and the hot water supply expansion valve 43 is provided with a valve opening degree detection sensor PH for detecting the valve opening degree.

In addition, the air-conditioning heat source side heat exchanger 24 of the air-conditioning hot-water supply system 100 according to the present embodiment includes an air-conditioning heat exchanger outlet temperature measuring unit that measures the temperature of the air-conditioning refrigerant in the vicinity of the air-conditioning refrigerant outlet 24b during cooling. A temperature sensor TH22 is provided. The vicinity here indicates a position closer to the cooling air-conditioning refrigerant outlet 24b than the midpoint of the path in the path through which the air-conditioning refrigerant flows in the air-conditioning heat source side heat exchanger 24.
The temperature of the air conditioning refrigerant measured by the temperature sensor TH22 is set as the air conditioning heat exchanger outlet temperature of the air conditioning heat source side heat exchanger 24.
Similarly, the hot water supply heat source side heat exchanger 44 is provided with a temperature sensor TH23 as hot water supply heat exchanger outlet temperature measuring means for measuring the temperature of the hot water supply refrigerant in the vicinity of the hot water supply refrigerant outlet 44b. The vicinity mentioned here indicates a position closer to the hot water supply refrigerant outlet 44b than the middle point of the path in the path through which the hot water supply refrigerant flows in the hot water supply heat source side heat exchanger 44.
Then, the temperature of the hot water supply refrigerant measured by the temperature sensor TH23 is set as the hot water supply heat exchanger outlet temperature of the hot water supply heat source side heat exchanger 44.

  The control device 1a is configured such that command signals from a remote controller (not shown), temperature sensors TH1 to TH23, rotational speed detection sensors RA and RH, and detection signals from valve opening degree detection sensors PA and PH are input. The Based on these input signals, the control device 1a starts and stops the air conditioning compressor 21 and the hot water supply compressor 41, switches between the four-way valves 22 and 53, the air conditioning expansion valve 27, and the hot water supply expansion valve 43. Setting of the opening, setting of the valve opening of the air conditioning refrigerant flow rate adjustment valve 35c, the second control valve 35d, the hot water supply refrigerant flow rate adjustment valve 49a, the fourth control valve 49c, driving or stopping of the air conditioning cold / hot water circulation pump 52, Control necessary for opening / closing the on-off valves 35a, 35b, 49b, 49d, 54a, 54b and other operations of the air conditioning and hot water supply system 100 is executed.

  For example, in the air conditioning and hot water supply system 100 according to the present embodiment, heat exchange is performed between the air conditioning refrigerant that flows through the air conditioning refrigerant circuit 5 and the hot water supply refrigerant that flows through the hot water supply refrigerant circuit 6 via the intermediate heat exchanger 23. However, “exhaust heat recovery operation” in which the cooling operation is performed in the air conditioning cycle and the hot water supply operation is performed in the hot water supply cycle is possible.

  Basically, the air conditioning and hot water supply system 100 is set to the “first operation state” shown in FIG. 2 during the exhaust heat recovery operation. That is, the hot water supply compressor 41 is operated in the hot water supply cycle, the hot water supply side heat exchanger 42 is used as a condenser, the hot water supply heat source side heat exchanger 44 is not used, and the intermediate heat exchanger 23 is evaporated. Used as a vessel. On the other hand, in the air conditioning cycle, the air conditioning compressor 21 is operated, the air conditioning use side heat exchanger 28 is used as an evaporator, the air conditioning heat source side heat exchanger 24 is not used, and the intermediate heat exchanger 23 is condensed. Used as a vessel.

With reference to FIGS. 3-5, the flow of the refrigerant | coolant (refrigerant for an air conditioning, the hot water supply refrigerant | coolant) and the flow of the water (heat transfer medium) which distribute | circulates the cold / hot water circulation circuit 8 for an air conditioning in an exhaust heat recovery driving | operation is demonstrated.
3 to 5, heat exchangers (intermediate heat exchanger 23, air conditioning use side heat exchanger 28, air conditioning heat source side heat exchanger 24, hot water supply use side heat exchanger 42, hot water supply heat source side heat The thick arrows attached to the exchanger 44) indicate the flow of heat, and are attached to each circuit (the air conditioning refrigerant circuit 5, the hot water supply refrigerant circuit 6, the air conditioning cold / hot water circulation circuit 8, the hot water supply passage 9). The arrows indicate the directions in which refrigerant (air conditioning refrigerant, hot water supply refrigerant) or fluid (water, hot water) flows through each circuit. Also, the white on-off valve (35a, 35b, 49b, 49d) and the white flow control valve (air conditioning refrigerant flow rate adjustment valve 35c, second control valve 35d, hot water supply refrigerant flow rate adjustment valve 49a, fourth control valve 49c). Indicates the opened state, and the black on-off valve and the black flow control valve are closed. In the four-way valve (22, 53), the arc indicated by the solid line indicates the refrigerant and fluid flow paths. Further, the outdoor fans (air conditioning outdoor fan 25 and hot water supply outdoor fan 45) are in operation when white, and are stopped when black. The heat exchangers (intermediate heat exchanger 23, air-conditioning heat source side heat exchanger 24, hot water supply heat source side heat exchanger 44) indicated by broken lines are heat exchangers that are not used, that is, heat that does not circulate refrigerant. A heat exchanger indicated by a solid line indicates a heat exchanger to be used, that is, a heat exchanger through which a refrigerant flows.

When the exhaust heat recovery operation of the air conditioning hot water supply system 100 is performed, the control device 1a sets the air conditioning hot water supply system 100 to the “first operation state” as illustrated in FIG. That is, the control device 1a is configured such that the high-temperature and high-pressure gas refrigerant discharged from the discharge port 21b of the air-conditioning compressor 21 flows into the intermediate heat exchanger 23 and flows through the air-conditioning use-side heat exchanger 28. Switches the four-way valve 22 so as to flow into the suction port 21a of the air conditioning compressor 21.
Further, the control device 1a closes the air conditioning refrigerant flow rate adjustment valve 35c and the second control valve 35d, stops the air conditioning outdoor fan 25, and closes the hot water supply refrigerant flow rate adjustment valve 49a and the fourth control valve 49c. At the same time, the outdoor hot water supply fan 45 is stopped.
Since the flow of the air conditioning refrigerant to the air conditioning heat source side heat exchanger 24 is blocked by closing the air conditioning refrigerant flow rate adjusting valve 35c, the air conditioning refrigerant flow rate adjusting valve 35c in this embodiment is the air conditioning heat source. It functions as a refrigerant shut-off means for air conditioning to the side heat exchanger 24. As the air conditioning refrigerant shut-off means, a configuration in which a shut-off valve (not shown) is provided in the air conditioning refrigerant inlet 24a in addition to the air conditioning refrigerant flow rate adjustment valve 35c.
Similarly, since the flow of the hot water supply refrigerant to the hot water supply heat source side heat exchanger 44 is blocked by closing the hot water supply refrigerant flow rate adjustment valve 49a, the hot water supply refrigerant flow rate adjustment valve 49a in the present embodiment is It functions as a hot water supply refrigerant blocking means for the hot water supply heat source side heat exchanger 44. The hot water supply refrigerant shut-off means may be configured such that a shut-off valve (not shown) is provided in the hot water supply refrigerant inlet 44a in addition to the hot water supply refrigerant flow rate adjustment valve 49a.
Further, the control device 1a opens the on-off valves 35a, 35b, 49b, 49d.
The control device 1a opens the air conditioning refrigerant flow rate adjustment valve 35c and the second control valve 35d as necessary to operate the air conditioning outdoor fan 25, and supplies the hot water supply refrigerant flow rate adjustment valve 49a and the fourth control valve. 49c is opened to operate the hot water supply outdoor fan 45, the details of which will be described later.

  The high-temperature and high-pressure gas refrigerant discharged from the air conditioning compressor 21 flows into the intermediate heat exchanger 23, dissipates heat to the low-temperature hot water supply refrigerant, and is condensed and liquefied. This high-pressure liquid refrigerant is decompressed and expanded by an air-conditioning expansion valve 27 that is opened at a predetermined opening after flowing through the air-conditioning tank 26 to become a low-temperature and low-pressure gas-liquid two-phase refrigerant. It flows into the heat exchanger 28. The gas-liquid two-phase refrigerant flowing in the air-conditioning use-side heat exchanger 28 absorbs heat from the relatively high-temperature cold water flowing through the air-conditioning cold / hot water circulation circuit 8 and evaporates to become a low-pressure gas refrigerant. This low-pressure gas refrigerant flows into the suction port 21a of the air-conditioning compressor 21 via the four-way valve 22, and is compressed again by the air-conditioning compressor 21 to become a high-temperature and high-pressure gas refrigerant.

  In the cold / hot water circulation circuit 8 for air conditioning, the cold water radiated to the air-conditioning refrigerant flowing through the air-conditioning use-side heat exchanger 28 is circulated through the air-conditioning cold / hot water pipe 55 a by the air-conditioning cold / hot water circulation pump 52 and flows into the indoor heat exchanger 61. To do. In the indoor heat exchanger 61, heat is exchanged between the cold water in the cold / hot water circulation circuit 8 for air conditioning and the hot air in the room of the house 60, and the air in the house 60 is cooled. That is, the room of the house 60 is cooled. At this time, the cold water flowing through the indoor heat exchanger 61 absorbs heat from the indoor air of the house 60 and rises in temperature. The heated cold water flows through the air conditioning cold / hot water pipes 55b and 55c by the air conditioning cold / hot water pump 52, and is again radiated to the air conditioning refrigerant by the air conditioning use side heat exchanger 28 and cooled.

  In the hot water supply refrigerant circuit 6, the gas refrigerant compressed by the hot water supply compressor 41 and having a high temperature and high pressure flows into the hot water supply use side heat exchanger 42. The high-temperature and high-pressure gas refrigerant flowing in the hot water use side heat exchanger 42 dissipates heat to the water flowing in the hot water supply passage 9 and condenses and liquefies. The liquefied high-pressure liquid refrigerant flows through the hot water supply refrigerant tank 46, and then is decompressed and expanded by the hot water supply expansion valve 43 opened at a predetermined opening degree to become a low-temperature low-pressure gas-liquid two-phase refrigerant. . While flowing through the intermediate heat exchanger 23, the gas-liquid two-phase refrigerant absorbs heat from the high-temperature air-conditioning refrigerant flowing through the intermediate heat exchanger 23 and evaporates to become a low-pressure gas refrigerant. This low-pressure gas refrigerant flows into the suction port 41a of the hot water supply compressor 41 and is compressed again by the hot water supply compressor 41 to become a high-temperature high-pressure gas refrigerant.

  In the hot water supply passage 9, the water flowing into the water supply port 78 flows through the hot water supply pipe 72 and flows into the hot water use side heat exchanger 42. Then, the hot water supply side heat exchanger 42 absorbs heat from the hot water supply refrigerant flowing through the hot water supply refrigerant circuit 6 and becomes high-temperature water (hot water). This hot water is circulated through the hot water supply pipe 73 and stored in the hot water storage tank 70, and hot water is supplied from the hot water supply port 79 according to the user's request.

  Thus, in the exhaust heat recovery operation, the air conditioning hot water supply system 100 is set to the “first operation state”. The heat recovered by the air conditioning refrigerant flowing through the air conditioning refrigerant circuit 5 from the room of the house 60 is absorbed by the hot water supply refrigerant flowing through the hot water supply refrigerant circuit 6 via the intermediate heat exchanger 23, and then used for hot water supply. Heat is transferred to the water flowing through the hot water supply pipe 72 via the use side heat exchanger 42. By this operation, the heat recovered from the room of the house 60 can be used as a heating source for water flowing through the hot water supply pipe 72.

However, the amount of heat (hereinafter referred to as air-conditioning heat dissipation amount) radiated by the air-conditioning refrigerant flowing through the air-conditioning refrigerant circuit 5 in the intermediate heat exchanger 23 and the air-conditioning heat source side heat exchanger 24 is from the room of the house 60 to the indoor heat. Since the amount of heat collected by the exchanger 61 is determined by the temperature set by the user as the room temperature of the house 60, the outside air temperature, or the like.
On the other hand, the amount of heat required for boiling water flowing through the hot water supply pipe 72 (hereinafter referred to as hot water supply heat absorption amount) is a temperature set by the user as the hot water temperature of hot water stored in the hot water storage tank 70 or a water supply port 78. It is determined by the temperature of the water supplied from. Therefore, the air-conditioning heat radiation amount and the hot water supply heat absorption amount may not match.

  For example, when the air conditioning heat dissipation amount is larger than the hot water supply heat absorption amount (air conditioning heat dissipation amount> hot water supply heat absorption amount), such as when the cooling load is high in the air conditioning cycle, all of the air conditioning refrigerant flowing through the air conditioning refrigerant circuit 5 is subjected to intermediate heat exchange. When flowing through the hot water supply 23, the amount of heat supplied to the water flowing through the hot water supply pipe 72 via the hot water supply refrigerant flowing through the hot water supply refrigerant circuit 6 becomes excessive. Therefore, when the air-conditioning heat dissipation amount is larger than the hot-water supply heat absorption amount, the air-conditioning refrigerant flowing through the air-conditioning refrigerant circuit 5 is distributed to the intermediate heat exchanger 23 and the air-conditioning heat source side heat exchanger 24, and the air-conditioning refrigerant is intermediate. A configuration in which the air conditioning and hot water supply system 100 is controlled so that the amount of heat radiated by the heat exchanger 23 is equal to the amount of absorbed hot water supply is preferable.

Therefore, if the air-conditioning heat dissipation amount is larger than the hot-water supply heat absorption amount when the exhaust heat recovery operation is performed, the control device 1a configures the air-conditioning hot-water supply system 100 so as to use the air-conditioning heat source side heat exchanger 24 as a condenser. To the “second operating state”.
Specifically, as shown in FIG. 4, the control device 1 a opens the air conditioning refrigerant flow rate adjustment valve 35 c and the second control valve 35 d and operates the air conditioning outdoor fan 25. Further, the hot water supply refrigerant flow rate adjustment valve 49a and the fourth control valve 49c are closed and the hot water supply outdoor fan 45 is stopped.

  When the air conditioning and hot water supply system 100 is set to the “second operating state”, the high-temperature and high-pressure gas refrigerant discharged from the discharge port 21 b of the air-conditioning compressor 21 is intermediated via the four-way valve 22 in the air-conditioning refrigerant circuit 5. It flows into the heat exchanger 23 and the heat source side heat exchanger 24 for air conditioning. The high-temperature and high-pressure gas refrigerant flowing through the intermediate heat exchanger 23 dissipates heat to the hot water supply refrigerant in the intermediate heat exchanger 23 and is condensed and liquefied. On the other hand, the high-temperature and high-pressure gas refrigerant flowing into the air-conditioning heat source side heat exchanger 24 dissipates heat to the atmosphere and condenses and liquefies. The high-pressure liquid refrigerant liquefied by the intermediate heat exchanger 23 and the air-conditioning heat source side heat exchanger 24 is depressurized by the air-conditioning expansion valve 27 that opens at a predetermined opening after flowing through the air-conditioning refrigerant tank 26. The refrigerant expands into a low-temperature and low-pressure gas-liquid two-phase refrigerant and flows into the air-conditioning use-side heat exchanger 28. The gas-liquid two-phase refrigerant flowing in the air-conditioning use-side heat exchanger 28 absorbs heat from the relatively high-temperature cold water flowing through the air-conditioning cold / hot water circulation circuit 8 and evaporates to become a low-pressure gas refrigerant. This low-pressure gas refrigerant flows into the suction port 21a of the air-conditioning compressor 21 via the four-way valve 22, and is compressed again by the air-conditioning compressor 21 to become a high-temperature and high-pressure gas refrigerant.

  On the other hand, in the hot water supply refrigerant circuit 6, the high-temperature and high-pressure gas refrigerant discharged from the discharge port 41 b of the hot water supply compressor 41 flows into the hot water supply use side heat exchanger 42. The high-temperature and high-pressure gas refrigerant flowing in the hot water use side heat exchanger 42 dissipates heat to the water flowing in the hot water supply passage 9 and condenses and liquefies. The liquefied high-pressure liquid refrigerant flows through the hot water supply refrigerant tank 46, and then is decompressed and expanded by the hot water supply expansion valve 43 opened at a predetermined opening degree to become a low-temperature low-pressure gas-liquid two-phase refrigerant. . While the gas-liquid two-phase refrigerant flows through the intermediate heat exchanger 23, the gas-liquid two-phase refrigerant absorbs heat from the high-temperature air-conditioning refrigerant flowing through the intermediate heat exchanger 23 and evaporates to become a low-pressure gas refrigerant. This low-pressure gas refrigerant flows into the suction port 41a of the hot water supply compressor 41 and is compressed again by the hot water supply compressor 41 to become a high-temperature high-pressure gas refrigerant.

  Thus, when the air conditioning heat radiation amount is larger than the hot water supply heat absorption amount, the control device 1a opens the air conditioning refrigerant flow rate adjustment valve 35c and the second control valve 35d and performs the air conditioning outdoor fan 25 when performing the exhaust heat recovery operation. , And a part of the air-conditioning heat radiation amount is radiated to the atmosphere by the air-conditioning heat source side heat exchanger 24, thereby avoiding an excessive amount of heat supplied to the water flowing through the hot water supply pipe 72.

  Here, the condensation temperature “Tca” of the refrigerant circuit 5 for air conditioning must be higher than the outdoor air temperature “Tao” because it must radiate heat to the outdoor air. On the other hand, in the exhaust heat recovery operation, the hot water supply refrigerant flowing through the hot water supply refrigerant circuit 6 and the air conditioning refrigerant flowing through the air conditioning refrigerant circuit 5 exchange heat in the intermediate heat exchanger 23 to absorb and release heat. Therefore, the condensation temperature “Tca” of the air conditioning refrigerant circuit 5 must be higher than the evaporation temperature “Tee” of the hot water supply refrigerant circuit 6. That is, in the exhaust heat recovery operation, if the conditions of “Tca> Tao” and “Tca> Tee” are not satisfied in the heat source side heat exchanger 24 and the intermediate heat exchanger 23, the air conditioning refrigerant circuit 5 The heat dissipation amount (air conditioning heat dissipation amount) will be insufficient.

For example, “Tca≈Tao” due to “Tao << Tee”, and if the amount of heat radiation becomes insufficient in the heat source side heat exchanger 24 for air conditioning, or “Tca≈Tee” due to “Tao << Tee”. For example, the intermediate heat exchanger 23 may be insufficient in the amount of heat absorbed or dissipated.
At this time, the air-conditioning refrigerant is insufficiently heat-dissipated or cannot be dissipated, and the air-conditioning refrigerant having a high degree of dryness flows out from the intermediate heat exchanger 23 or the air-conditioning heat source side heat exchanger 24. Since the air-conditioning refrigerant having a high dryness has a large specific volume, the flow velocity becomes extremely high when passing through the air-conditioning expansion valve 27. As a result, the flow resistance increases and a phenomenon occurs in which the flow is blocked, causing a problem that the operation of the entire air conditioning and hot water supply system 100 becomes unstable.

Therefore, when the air-conditioning heat dissipation amount is larger than the hot-water supply heat absorption amount, the control device 1a performs air-conditioning heat source side heat exchange at a flow rate such that all of the high-temperature and high-pressure gas refrigerant flowing into the air-conditioning heat source side heat exchanger 24 is liquefied. The valve opening degree of the air conditioning refrigerant flow rate adjustment valve 35c is adjusted so that the gas refrigerant flows through the vessel 24.
Then, the control device 1a adjusts the valve opening degree of the air conditioning refrigerant flow rate adjustment valve 35c based on the temperature of the air conditioning refrigerant in the heat source side heat exchanger 24 for air conditioning.
Specifically, the control device 1a determines the temperature of the air-conditioning refrigerant (air-conditioning) calculated based on data received from the temperature sensor TH22 provided in the air-conditioning heat source side heat exchanger 24 (near the air-conditioning refrigerant outlet 24b). The opening degree of the air conditioning refrigerant flow rate adjustment valve 35c is adjusted so that the heat exchanger outlet temperature) becomes a condensation temperature (target condensation temperature) in the air conditioning refrigerant circuit 5 calculated in advance.
With this configuration, it is possible to prevent an increase in flow resistance resulting from a shortage of heat released from the heat source side heat exchanger 24 for air conditioning, and to prevent occurrence of a phenomenon such as a flow blockage.

  On the other hand, when the amount of heat absorbed by the hot water supply is greater than the amount of heat absorbed by the air conditioning (the amount of heat absorbed by the hot water> the amount of heat released by the air conditioning), even if all of the air conditioning refrigerant flowing through the air conditioning refrigerant circuit 5 flows through the intermediate heat exchanger 23. The amount of heat supplied to the water flowing through the hot water supply pipe 72 via the hot water supply refrigerant flowing through the circuit 6 is insufficient. Therefore, when the hot-water supply heat absorption amount is larger than the air-conditioning heat dissipation amount, all of the air-conditioning refrigerant flowing through the air-conditioning refrigerant circuit 5 flows to the intermediate heat exchanger 23, and all the heat amount of the air-conditioning refrigerant has the intermediate heat exchanger 23. A configuration in which the air conditioning and hot water supply system 100 is controlled so as to dissipate heat is preferable.

Therefore, the control device 1a sets the air conditioning hot water supply system 100 in the “third operation state” shown in FIG. 2 so that the hot water supply heat source side heat exchanger 44 is used as an evaporator when the hot water supply heat absorption amount is larger than the air conditioning heat dissipation amount. Set to.
Specifically, the control device 1a closes the air conditioning refrigerant flow rate adjustment valve 35c and the second control valve 35d and stops the air conditioning outdoor fan 25 as shown in FIG. Further, the hot water supply refrigerant flow rate adjustment valve 49a and the fourth control valve 49c are opened, and the hot water supply outdoor fan 45 is operated.

  When the air conditioning and hot water supply system 100 is set to the “third operation state”, the high-temperature and high-pressure gas refrigerant discharged from the discharge port 21 b of the air-conditioning compressor 21 is intermediated via the four-way valve 22 in the air-conditioning refrigerant circuit 5. It flows into the heat exchanger 23. The high-temperature and high-pressure gas refrigerant flowing through the intermediate heat exchanger 23 dissipates heat to the hot water supply refrigerant in the intermediate heat exchanger 23 and is condensed and liquefied. Then, the high-pressure liquid refrigerant liquefied by the intermediate heat exchanger 23 is decompressed and expanded by the air-conditioning expansion valve 27 which is opened at a predetermined opening after flowing through the air-conditioning refrigerant tank 26, and is a low-temperature and low-pressure gas-liquid. It becomes a two-phase refrigerant and flows into the air-conditioning use side heat exchanger 28. The gas-liquid two-phase refrigerant flowing in the air-conditioning use-side heat exchanger 28 absorbs heat from the relatively high-temperature cold water flowing through the air-conditioning cold / hot water circulation circuit 8 and evaporates to become a low-pressure gas refrigerant. This low-pressure gas refrigerant flows into the suction port 21a of the air-conditioning compressor 21 via the four-way valve 22, and is compressed again by the air-conditioning compressor 21 to become a high-temperature and high-pressure gas refrigerant.

On the other hand, in the hot water supply refrigerant circuit 6, the high-temperature and high-pressure gas refrigerant discharged from the discharge port 41 b of the hot water supply compressor 41 flows into the hot water supply use side heat exchanger 42. The high-temperature and high-pressure gas refrigerant flowing in the hot water use side heat exchanger 42 dissipates heat to the water flowing in the hot water supply passage 9 and condenses and liquefies. The liquefied high-pressure liquid refrigerant flows through the hot water supply refrigerant tank 46, and then is decompressed and expanded by the hot water supply expansion valve 43 opened at a predetermined opening degree to become a low-temperature low-pressure gas-liquid two-phase refrigerant. . A part of the gas-liquid two-phase refrigerant absorbs heat from the high-temperature air-conditioning refrigerant flowing through the intermediate heat exchanger 23 while flowing through the intermediate heat exchanger 23, and becomes a low-pressure gas refrigerant. This low-pressure gas refrigerant flows into the suction port 41a of the hot water supply compressor 41 and is compressed again by the hot water supply compressor 41 to become a high-temperature high-pressure gas refrigerant.
Further, the low-temperature and low-pressure gas-liquid two-phase refrigerant that is decompressed and expanded by the hot water supply expansion valve 43 and does not flow into the intermediate heat exchanger 23 flows into the hot water supply heat source side heat exchanger 44 and is blown by the hot water supply outdoor fan 45. The refrigerant absorbs heat from the relatively high-temperature atmosphere and evaporates, becomes a low-pressure gas refrigerant, flows from the suction port 41a of the hot-water supply compressor 41, and is compressed again by the hot-water supply compressor 41. Become.

  As described above, when the hot water supply heat absorption amount is larger than the air conditioning heat dissipation amount, a part of the hot water supply refrigerant flowing through the hot water supply refrigerant circuit 6 absorbs heat in the hot water supply heat source side heat exchanger 44 and evaporates. The hot water supply heat source side heat exchanger 44 is configured so that the hot water supply refrigerant flows more easily than the intermediate heat exchanger 23. Therefore, a large amount of hot water supply refrigerant flows into the hot water supply heat source side heat exchanger 44, and the intermediate heat exchanger. The amount of heat exchange between the air conditioning refrigerant and the hot water supply refrigerant at 23 is smaller than the desired amount of heat.

Therefore, when the amount of heat absorbed by the hot water supply is larger than the amount of heat released from the air conditioning, the control device 1a performs heat exchange on the heat source side for hot water supply at a flow rate such that all of the high-temperature and high-pressure gas refrigerant flowing into the heat source side heat exchanger for hot water supply is vaporized. The valve opening degree of the hot water supply refrigerant flow rate adjustment valve 49a is adjusted so that the gas refrigerant flows through the vessel 44.
The control device 1a adjusts the valve opening degree of the hot water supply refrigerant flow rate adjustment valve 49a based on the temperature of the hot water supply refrigerant in the hot water supply heat source side heat exchanger 44.
Specifically, the control device 1a calculates in advance the temperature of the hot water supply refrigerant (hot water supply heat exchanger outlet temperature) calculated based on data received from the temperature sensor TH23 provided in the hot water supply heat source side heat exchanger 44. The valve opening degree of the hot water supply refrigerant flow rate adjustment valve 49a is adjusted so that the evaporation temperature (target evaporation temperature) in the hot water supply refrigerant circuit 6 is reached.
With this configuration, in the intermediate heat exchanger 23, a desired amount of heat can be exchanged between the air conditioning refrigerant and the hot water supply refrigerant.

A procedure when the control device 1a performs the exhaust heat recovery operation of the air conditioning hot water supply system 100 will be described with reference to FIG. 6 (refer to FIGS. 1 to 5 as appropriate).
The control device 1a is configured to start the exhaust heat recovery operation of the air conditioning and hot water supply system 100, for example, when receiving a command signal from a remote controller (not shown) operated by the user. For example, when the user enters the room of the house 60 and starts a cooling operation (cooling operation of the air conditioning cycle) of an air conditioner (not shown) by remote control operation, the control device 1a is discharged when the hot water supply operation is performed in the hot water supply cycle. It is configured to initiate a heat recovery operation.
Alternatively, when the cooling operation is performed in the air conditioning cycle, when the hot water supply operation in the hot water supply cycle is started by a user operation or the like, the control device 1a is configured to start the exhaust heat recovery operation.
In addition, based on an operation program incorporated in advance, for example, the control device 1a may automatically start the exhaust heat recovery operation of the air conditioning hot water supply system 100 at a predetermined time set in advance.

When the exhaust heat recovery operation is started, the control device 1a closes the air conditioning refrigerant flow rate adjustment valve 35c, the second control valve 35d, the hot water supply refrigerant flow rate adjustment valve 49a, and the fourth control valve 49c (step S1), and thereafter. Then, various data reception processing is performed (step S2). Specifically, the control device 1a receives data indicating the target hot water temperature (boiling temperature), the target hot water amount (flow rate), and the water temperature (water supply temperature) of water supplied from the water supply port 78 in the hot water supply cycle. In addition, data indicating the target temperature (set room temperature), the target air volume, and the room temperature in the air conditioning cycle is received.
Data indicating the target hot water temperature and target hot water volume of the hot water supply cycle is data input to the control device 1a from a remote controller (not shown) operated by the user, and data indicating the water supply temperature is input from the temperature sensor TH1. It is data.
The data indicating the target temperature and target air volume of the air conditioning cycle is data input to the control device 1a from the remote controller operated by the user, and the data indicating the room temperature is data input from the temperature sensor TH20.

The control device 1a executes arithmetic processing based on each data received in step S2 (step S3). Specifically, the control device 1a sets the target hot water supply capacity “Qh” in the hot water supply cycle, the target rotation speed of the hot water supply compressor 41, the target discharge temperature “Td” of the hot water supply compressor 41, and the input “ Whcomp "is calculated.
Further, the control device 1a sets the target air conditioning capacity “Qc” in the air conditioning cycle, the target rotational speed of the air conditioning compressor 21, the target evaporation temperature “Te” of the air conditioning refrigerant, and the input “Wccomp” of the air conditioning compressor 21. Calculate.
Further, the control device 1a calculates the amount of heat absorbed by the hot water supply from the difference between the target hot water supply capacity “Qh” of the hot water supply cycle and the input “Whcomp” of the hot water supply compressor 41, and the target air conditioning capacity “Qc” of the air conditioning cycle and the air conditioning. The air conditioning heat radiation amount is calculated from the sum of the input “Wccomp” of the compressor 21 (step S4).

Then, the control device 1a compares the hot water supply heat absorption amount calculated in step S4 with the air conditioning heat dissipation amount (step S5), and determines whether the hot water supply heat absorption amount and the air conditioning heat dissipation amount are equal. In step S5, control device 1a determines that the hot water supply heat absorption amount and the air conditioning heat radiation amount are equal when the difference between the hot water heat absorption amount and the air conditioning heat radiation amount is within a preset range.
When the hot water supply heat absorption amount is equal to the air conditioning heat dissipation amount (step S5 → Yes), the control device 1a sets the air conditioning hot water supply system 100 to the “first operation state” and executes the exhaust heat recovery operation (step S6). .
That is, the “first operation state” in the present embodiment is a state of the air conditioning and hot water supply system 100 when the exhaust heat recovery operation is performed when the hot water supply heat absorption amount and the air conditioning heat radiation amount are equal.

With reference to FIG. 7, a description will be given of a procedure in which the control device 1a performs the exhaust heat recovery operation by setting the air conditioning and hot water supply system 100 to the “first operation state”.
The control device 1a includes an on-off valve 35a disposed at the inlet / outlet of the intermediate heat exchanger 23 (cooling air conditioning refrigerant inlet 23a, cooling air conditioning refrigerant outlet 23b, hot water supply refrigerant inlet 23c, hot water supply refrigerant outlet 23d). All of 35b, 49b, and 49d are opened (step S601). Further, the control device 1a closes the hot water supply refrigerant flow rate adjustment valve 49a and the fourth control valve 49c disposed at the inlet / outlet of the hot water supply heat source side heat exchanger 44 (the hot water supply refrigerant inlet 44a and the hot water supply refrigerant outlet 44b). The hot water supply outdoor fan 45 is stopped while the valve is turned on (step S602). Further, the air conditioning refrigerant flow rate adjustment valve 35c and the second control valve 35d disposed at the inlet / outlet of the air conditioning heat source side heat exchanger 24 (cooling air conditioning refrigerant inlet 24a, cooling air conditioning refrigerant outlet 24b) are closed. At the same time, the outdoor fan 25 for air conditioning is stopped (step S603).
That is, the controller 1a sets the air conditioning and hot water supply system 100 to perform the cooling operation and the hot water supply operation using only the intermediate heat exchanger 23 as shown in FIG. .

And control device 1a operates a hot-water supply cycle and an air-conditioning cycle according to a calculation result in Step S3 of Drawing 6. Specifically, the control device 1a operates the hot water supply compressor 41 at the target rotation speed calculated in step S3 of FIG. 6 in the hot water supply cycle, and the discharge temperature of the hot water supply refrigerant in the hot water supply cycle is the target discharge temperature “Td”. The valve opening degree of the hot water supply expansion valve 43 is set so as to become "(step S604).
For example, a map indicating the relationship between the target discharge temperature and the valve opening of the hot water supply expansion valve 43 is determined in advance, and the controller 1a refers to the map based on the calculated target discharge temperature “Td”. What is necessary is just to set it as the structure which sets the valve opening degree of the expansion valve 43. FIG.
Then, in the air conditioning cycle, the control device 1a operates the air conditioning compressor 21 at the target rotational speed calculated in step S3 of FIG. 6, and the evaporation temperature of the air conditioning refrigerant in the air conditioning cycle is the target evaporation temperature “Te”. Then, the opening degree of the air conditioning expansion valve 27 is set (step S605), and the process returns.
For example, a map indicating the relationship between the target evaporation temperature and the valve opening degree of the air conditioning expansion valve 27 is determined in advance, and the control device 1a refers to the calculated map based on the calculated target evaporation temperature “Te”. What is necessary is just to set it as the structure which sets the valve opening degree of the expansion valve 27. FIG.
Thus, when the hot water supply heat absorption amount and the air conditioning heat radiation amount are equal, the control device 1a sets the air conditioning hot water supply system 100 to the “first operation state” and performs the exhaust heat recovery operation.
As shown in the flowchart of FIG. 7, when returning from the procedure for setting the air conditioning and hot water supply system 100 to the “first operation state” and performing the exhaust heat recovery operation, the control device 1a returns the procedure to step S2 of FIG. From step S6 to step S2), the exhaust heat recovery operation is continued.

The description returns to step S5 in FIG. When the hot water supply heat absorption amount and the air conditioning heat dissipation amount are not equal (step S5 → No), the control device 1a compares the hot water supply heat absorption amount with the air conditioning heat dissipation amount (step S7), and the hot water supply heat absorption amount is less than the air conditioning heat dissipation amount. (Step S7 → Yes), the air conditioning hot water supply system 100 is set to the “second operation state”, and the exhaust heat recovery operation is executed (Step S8).
That is, the “second operation state” is a state of the air conditioning and hot water supply system 100 when the exhaust heat recovery operation is performed when the hot water supply heat absorption amount is less than the air conditioning heat dissipation amount.

With reference to FIG. 8, the procedure in which the control device 1a performs the exhaust heat recovery operation by setting the air conditioning and hot water supply system 100 to the “second operation state” will be described.
The control device 1a includes an on-off valve 35a disposed at the inlet / outlet of the intermediate heat exchanger 23 (cooling air conditioning refrigerant inlet 23a, cooling air conditioning refrigerant outlet 23b, hot water supply refrigerant inlet 23c, hot water supply refrigerant outlet 23d). All of 35b, 49b, and 49d are opened (step S801). Further, the control device 1a closes the hot water supply refrigerant flow rate adjustment valve 49a and the fourth control valve 49c disposed at the inlet / outlet of the hot water supply heat source side heat exchanger 44 (the hot water supply refrigerant inlet 44a and the hot water supply refrigerant outlet 44b). The hot water supply outdoor fan 45 is stopped while the valve is turned on (step S802). Further, the air conditioning refrigerant flow rate adjustment valve 35c and the second control valve 35d disposed at the inlet / outlet of the air conditioning heat source side heat exchanger 24 (cooling air conditioning refrigerant inlet 24a, cooling air conditioning refrigerant outlet 24b) are opened. (Step S803).
That is, since the air-conditioning heat dissipation amount is larger than the hot water supply heat absorption amount, the control device 1a converts the heat amount corresponding to the difference between the air conditioning heat dissipation amount and the hot water supply heat absorption amount into the atmosphere with the air conditioning heat source side heat exchanger 24 as shown in FIG. The air conditioning and hot water supply system 100 is set to perform cooling operation and hot water supply operation while dissipating heat.

  Thereafter, the control device 1a performs reception processing for each data (step S804). Specifically, the control device 1a receives the hot water supply heat absorption amount and the air conditioning heat release amount data calculated in step S4 of FIG. 6 and data indicating the outside air temperature input from the temperature sensor TH19. Based on the received data, the target evaporation temperature “Te” of the hot water supply refrigerant in the hot water supply cycle and the target condensation temperature “Tc” of the air conditioning refrigerant in the air conditioning cycle are calculated (step S805).

Then, the control device 1a operates the hot water supply cycle and the air conditioning cycle in accordance with the calculation result in step S805.
Specifically, the control device 1a operates the hot water supply compressor 41 at the target rotation speed in the hot water supply cycle, and the hot water supply expansion valve 43 so that the evaporation temperature of the hot water supply refrigerant in the hot water supply cycle becomes the target evaporation temperature “Te”. Set the valve opening.
Furthermore, the control device 1a operates the air conditioning compressor 21 at the target rotation speed in the air conditioning cycle, and rotates the air conditioning outdoor fan 25 so that the condensation temperature of the air conditioning refrigerant in the air conditioning cycle becomes the target condensation temperature “Tc”. The speed is set and the opening degree of the air conditioning expansion valve 27 is set (step S806).

For example, a map indicating the relationship between the target evaporation temperature and the valve opening degree of the hot water supply expansion valve 43 is determined in advance, and the control device 1a refers to the map based on the calculated target evaporation temperature “Te”. What is necessary is just to set it as the structure which sets the valve opening degree of the expansion valve 43. FIG.
Further, a map indicating the relationship between the target condensing temperature, the valve opening degree of the air conditioning expansion valve 27 and the rotational speed of the air conditioning outdoor fan 25 is determined in advance, and the control device 1a is based on the calculated target condensing temperature “Tc”. A configuration may be adopted in which the rotational speed of the air-conditioning outdoor fan 25 and the valve opening degree of the air-conditioning expansion valve 27 are set by referring to the map.

And the control apparatus 1a calculates the heat exchanger exit temperature for the air conditioning of the heat source side heat exchanger 24 for an air conditioning based on the data received from the temperature sensor TH22 (step S807).
Then, the control device 1a sets the valve opening degree of the air conditioning refrigerant flow rate adjustment valve 35c so that the air conditioning heat exchanger outlet temperature of the air conditioning heat source side heat exchanger 24 becomes the calculated target condensation temperature “Tc”. Set (step S808). Thus, the control device 1a adjusts the inflow amount of the air conditioning refrigerant to the heat source side heat exchanger 24 for air conditioning by setting the valve opening degree of the air conditioning refrigerant flow rate adjustment valve 35c.

Further, control device 1a determines whether or not the evaporation temperature of the hot water supply refrigerant in the hot water supply cycle is equal to target evaporation temperature "Te" (step S809). When the evaporation temperature of the hot water supply refrigerant in the hot water supply cycle is the target evaporation temperature “Te” (step S809 → Yes), the control device 1a sets the condensation temperature of the air conditioning refrigerant in the air conditioning cycle to the target condensation temperature “Tc”. It is determined whether or not (step S810). When the condensation temperature of the air conditioning refrigerant in the air conditioning cycle is the target condensation temperature “Tc” (step S810 → Yes), the hot water supply cycle operation is the target hot water supply capacity “Qh”, and the air conditioning cycle operation is the target air conditioning capacity “ When it is “Qc” (step S811 → Yes), the control device 1a returns after completing the procedure of the exhaust heat recovery operation in the second operation state, but the operation of the hot water supply cycle becomes the target hot water supply capacity “Qh”. If the air conditioning cycle has not reached the target air conditioning capacity “Qc” (step S811 → No), the control device 1a returns the procedure to step S806.
When the condensation temperature of the air-conditioning refrigerant in the air-conditioning cycle is not equal to the target condensation temperature “Tc” (step S810 → No), the control device 1a controls the valves for the air-conditioning refrigerant flow rate adjustment valve 35c and the second control valve 35d. The opening degree is set (step S812), and the procedure returns to step S806. Specifically, the control device 1a slightly closes the air conditioning refrigerant flow rate adjustment valve 35c and the second control valve 35d in step S812. Then, the procedure returns to step S806, and the following procedure is executed.

On the other hand, when the evaporation temperature of the hot water supply refrigerant in the hot water supply cycle is not equal to the target evaporation temperature “Te” (step S809 → No), the control device 1a returns the procedure to step S806, and the evaporation temperature of the hot water supply refrigerant in the hot water supply cycle Is adjusted to the target evaporation temperature “Te”.
As shown in the flowchart of FIG. 8, when returning from the procedure of setting the air conditioning and hot water supply system 100 to the “second operation state” and performing the exhaust heat recovery operation, the control device 1a returns the procedure to step S2 of FIG. From step S8 to step S2), the exhaust heat recovery operation is continued.

Thus, when the air conditioning heat radiation amount is larger than the hot water supply heat absorption amount, the empty control device 1a sets the air conditioning hot water supply system 100 to the “second operation state” and performs the exhaust heat recovery operation.
In this case, in the control device 1a, the air-conditioning heat exchanger outlet temperature in the vicinity of the air-conditioning refrigerant outlet 24b of the air-conditioning heat source side heat exchanger 24 becomes the calculated condensation temperature (target condensation temperature “Tc”). Thus, the valve opening degree of the air-conditioning refrigerant flow rate adjustment valve 35c is adjusted. With this configuration, it is possible to prevent an increase in flow resistance resulting from a shortage of heat released from the heat source side heat exchanger 24 for air conditioning, and to prevent occurrence of a phenomenon such as a flow blockage.

  The description returns to step S7 in FIG. When the hot water supply heat absorption amount is larger than the air conditioning heat dissipation amount (step S7 → No), the control device 1a sets the air conditioning hot water supply system 100 to the “third operation state” and executes the exhaust heat recovery operation (step S9). That is, the “third operation state” is a state of the air conditioning and hot water supply system 100 when the exhaust heat recovery operation is performed when the hot water supply heat absorption amount is larger than the air conditioning heat dissipation amount.

With reference to FIG. 9, a description will be given of a procedure in which the control device 1a performs the exhaust heat recovery operation by setting the air conditioning and hot water supply system 100 to the “third operation state”.
The control device 1a includes an on-off valve 35a disposed at the inlet / outlet of the intermediate heat exchanger 23 (cooling air conditioning refrigerant inlet 23a, cooling air conditioning refrigerant outlet 23b, hot water supply refrigerant inlet 23c, hot water supply refrigerant outlet 23d). All of 35b, 49b, and 49d are opened (step S901). Further, the control device 1a opens the hot water supply refrigerant flow rate adjustment valve 49a and the fourth control valve 49c disposed at the inlet / outlet of the hot water supply heat source side heat exchanger 44 (the hot water supply refrigerant inlet 44a and the hot water supply refrigerant outlet 44b). (Step S902). Further, the air conditioning refrigerant flow rate adjustment valve 35c and the second control valve 35d disposed at the inlet / outlet of the air conditioning heat source side heat exchanger 24 (cooling air conditioning refrigerant inlet 24a, cooling air conditioning refrigerant outlet 24b) are closed. In addition, the air-conditioning outdoor fan 25 is stopped (step S903).
In other words, since the amount of heat absorbed by the hot water supply is larger than the amount of heat released from the air conditioning, the control device 1a generates the amount of heat corresponding to the difference between the amount of heat absorbed by the hot water and the amount of heat released from the air conditioning from the atmosphere by the heat exchanger for heat supply for hot water 44 as shown in FIG. The air conditioning and hot water supply system 100 is set to perform cooling operation and hot water supply operation while absorbing heat.

  Thereafter, the control device 1a performs a reception process for each data (step S904). Specifically, the control device 1a receives the hot water supply heat absorption amount and the air conditioning heat release amount data calculated in step S4 of FIG. 6 and data indicating the outside air temperature input from the temperature sensor TH19. Based on the received data, the target evaporation temperature “Te” of the hot water supply refrigerant in the hot water supply cycle and the target condensation temperature “Tc” of the air conditioning refrigerant in the air conditioning cycle are calculated (step S905).

And control device 1a operates a hot-water supply cycle and an air-conditioning cycle according to a calculation result in Step S905.
Specifically, the control device 1a operates the air conditioning compressor 21 at the target rotational speed in the air conditioning cycle, and the air conditioning expansion valve 27 so that the condensation temperature of the air conditioning refrigerant in the air conditioning cycle becomes the target condensation temperature “Tc”. Set the valve opening.
Furthermore, the control device 1a operates the hot water supply compressor 41 at the target rotation speed in the hot water supply cycle, and rotates the hot water supply outdoor fan 45 so that the evaporation temperature of the hot water supply refrigerant in the hot water supply cycle becomes the target evaporation temperature “Te”. The speed is set and the valve opening degree of the hot water supply expansion valve 43 is set (step S906).

For example, a map indicating the relationship between the target condensing temperature and the valve opening degree of the air conditioning expansion valve 27 is determined in advance, and the control device 1a refers to the map based on the calculated target condensing temperature “Tc”. What is necessary is just to set it as the structure which sets the valve opening degree of the expansion valve 27. FIG.
Further, a map indicating the relationship between the target evaporation temperature, the valve opening degree of the hot water supply expansion valve 43 and the rotational speed of the hot water supply outdoor fan 45 is determined in advance, and the control device 1a is based on the calculated target evaporation temperature “Te”. A configuration may be adopted in which the rotational speed of the hot water supply outdoor fan 45 and the valve opening degree of the hot water supply expansion valve 43 are set by referring to the map.

Then, control device 1a calculates the hot water supply heat exchanger outlet temperature of hot water supply heat source side heat exchanger 44 based on the data received from temperature sensor TH23 (step S907).
Then, the control device 1a opens the valve opening of the hot water supply refrigerant flow rate adjustment valve 49a so that the hot water supply heat exchanger outlet temperature of the hot water supply heat source side heat exchanger 44 becomes the calculated target evaporation temperature “Te”. Is set (step S908). In this way, the control device 1a adjusts the flow rate of the hot water supply refrigerant into the hot water supply heat source side heat exchanger 44 by setting the valve opening degree of the hot water supply refrigerant flow rate adjustment valve 49a.

Furthermore, the control device 1a determines whether or not the condensing temperature of the air-conditioning refrigerant in the air-conditioning cycle is the target condensing temperature “Tc” (step S909). When the condensation temperature of the air-conditioning refrigerant in the air-conditioning cycle is the target condensation temperature “Tc” (step S909 → Yes), the controller 1a sets the evaporation temperature of the hot-water supply refrigerant in the hot-water supply cycle to the target evaporation temperature “Te”. It is determined whether or not (step S910). When the evaporation temperature of the hot water supply refrigerant in the hot water supply cycle is the target evaporation temperature “Te” (step S910 → Yes), the hot water supply cycle operation is the target hot water supply capacity “Qh”, and the air conditioning cycle operation is the target air conditioning capacity “ When “Qc” is set (step S911 → Yes), the control device 1a returns after completing the procedure of the exhaust heat recovery operation in the third operation state, but the operation of the hot water supply cycle becomes the target hot water supply capacity “Qh”. If the operation of the air conditioning cycle has not reached the target air conditioning capacity “Qc” (step S911 → No), the control device 1a returns the procedure to step S906.
When the evaporation temperature of the hot water supply refrigerant in the hot water supply cycle is not equal to the target evaporation temperature “Te” (step S910 → No), the control device 1a controls the valves for the hot water supply refrigerant flow rate adjustment valve 49a and the fourth control valve 49c. The opening degree is set (step S912), and the procedure returns to step S906. Specifically, the control device 1a slightly closes the hot water supply refrigerant flow rate adjustment valve 49a and the fourth control valve 49c in step S912. Then, the procedure is returned to step S906, and the following procedure is executed.
As shown in the flowchart of FIG. 9, when returning from the procedure for setting the air conditioning and hot water supply system 100 to the “third operation state” and performing the exhaust heat recovery operation, the control device 1 a returns the procedure to step S <b> 2 of FIG. 6 ( From step S9 to step S2), the exhaust heat recovery operation is continued.

  On the other hand, when the target condensing temperature “Tc” is not obtained in the air conditioning cycle (step S909 → No), the control device 1a returns the procedure to step S906, so that the target condensing temperature “Tc” is obtained. The valve opening of 27 is adjusted.

Thus, when the hot water supply heat absorption amount is larger than the air conditioning heat dissipation amount, the empty control device 1a sets the air conditioning hot water supply system 100 to the “third operation state” and performs the exhaust heat recovery operation.
In this case, the control device 1a uses the hot water supply refrigerant flow rate adjustment valve 49a so that the temperature in the vicinity of the hot water supply refrigerant outlet 44b of the hot water supply heat source side heat exchanger 44 becomes the evaporation temperature (target evaporation temperature) calculated in advance. Adjust the valve opening. With this configuration, it is possible to evaporate all of the hot water supply refrigerant in the intermediate heat exchanger 23 and the hot water supply heat source side heat exchanger 44, and in the intermediate heat exchanger 23, the air conditioning refrigerant and the hot water supply refrigerant A desired amount of heat can be exchanged.

As described above, the air conditioning hot water supply system 100 according to the present embodiment adjusts the air conditioning refrigerant flow rate to the air conditioning refrigerant inlet 24a side of the air conditioning heat source side heat exchanger 24 arranged in parallel with the intermediate heat exchanger 23. A valve 35c is arranged. When the exhaust heat recovery operation is performed during the cooling operation, the control device 1a uses the air conditioning refrigerant flow rate according to the air conditioning heat exchanger outlet temperature in the vicinity of the cooling air conditioning refrigerant outlet 24b in the air conditioning heat source side heat exchanger 24. The valve opening degree of the adjusting valve 35c is set.
With this configuration, the flow rate of the air-conditioning refrigerant to be circulated to the air-conditioning heat source side heat exchanger 24 can be adjusted when the exhaust heat recovery operation is performed when the air-conditioning heat dissipation amount is larger than the hot water supply heat absorption amount. The air conditioning refrigerant can be sufficiently cooled by the air conditioning heat source side heat exchanger 24, and all of the air conditioning refrigerant flowing through the air conditioning heat source side heat exchanger 24 can be condensed. In other words, it is possible to prevent an excessive increase in the flow resistance resulting from a shortage of heat radiation of the heat source side heat exchanger 24 for air conditioning, and to prevent the occurrence of a phenomenon such as a flow blockage.

On the other hand, when the exhaust heat recovery operation is performed when the hot-water supply heat absorption amount is larger than the air-conditioning heat dissipation amount, the control device 1a opens the hot-water supply refrigerant flow rate adjustment valve 49a to supply hot-water supply refrigerant to the hot-water supply heat source side heat exchanger 44. Vaporize with atmospheric heat. At this time, the control device 1a sets the valve opening degree of the hot water supply refrigerant flow rate adjustment valve 49a based on the hot water supply heat exchanger outlet temperature at the hot water supply refrigerant outlet 44b of the hot water supply heat source side heat exchanger 44.
With this configuration, when the exhaust heat recovery operation is performed when the amount of heat absorbed by the hot water supply is greater than the amount of heat released from the air conditioning, the intermediate heat exchanger 23 uses the hot water supply refrigerant flowing through the hot water supply refrigerant circuit 6 based on the target evaporation temperature in the hot water supply cycle. And the hot water supply heat source side heat exchanger 44. Then, all of the hot water supply refrigerant can be evaporated by the intermediate heat exchanger 23 and the hot water supply heat source side heat exchanger 44. Further, in the intermediate heat exchanger 23, desired air conditioning refrigerant and hot water supply refrigerant can be used. The amount of heat can be heat exchanged.

  The air conditioning and hot water supply system 100 according to the present embodiment includes an air conditioning refrigerant flow rate adjustment valve 35c on the cooling air conditioning refrigerant inlet 24a side of the air conditioning heat source side heat exchanger 24, and the hot water supply heat source side heat exchanger 44 includes: A hot water supply refrigerant flow rate adjustment valve 49a is provided on the hot water supply refrigerant inlet 44a side. As described above, the flow resistance of the intermediate heat exchanger 23 to the air conditioning refrigerant is greater than the flow resistance of the air conditioning heat source side heat exchanger 24 to the air conditioning refrigerant, and the intermediate heat exchanger 23 hot water supply refrigerant. This is because the flow path resistance with respect to the hot water supply heat source side heat exchanger 44 is larger than the flow path resistance with respect to the hot water supply refrigerant.

  Therefore, the flow path resistance of the intermediate heat exchanger 23 with respect to the air conditioning refrigerant is smaller than the flow resistance of the air conditioning heat source side heat exchanger 24 with respect to the air conditioning refrigerant, and the flow resistance of the intermediate heat exchanger 23 with respect to the hot water supply refrigerant is higher than that of the hot water supply. When the flow resistance with respect to the hot water supply refrigerant of the heat source side heat exchanger 44 is smaller than the flow path resistance, as shown in FIG. 10, the on-off valve 35a (FIG. 1) disposed at the cooling air conditioning refrigerant inlet 23a of the intermediate heat exchanger 23. The air conditioning refrigerant flow rate adjustment valve 35a1 capable of adjusting the flow rate is provided instead of the on / off valve 49b (see FIG. 1) provided at the hot water supply refrigerant inlet 23c of the intermediate heat exchanger 23. A possible hot water supply refrigerant flow rate adjustment valve 49b1 may be provided.

In this configuration, the air conditioning heat exchanger outlet temperature measuring means (temperature sensor TH24) for measuring the temperature of the air conditioning refrigerant in the vicinity of the cooling air conditioning refrigerant outlet 23b of the intermediate heat exchanger 23, and the intermediate heat exchanger 23 A configuration provided with a hot water supply heat exchanger outlet temperature measuring means (temperature sensor TH25) for measuring the temperature of the hot water supply refrigerant in the vicinity of the hot water supply refrigerant outlet 23d is preferable.
The temperature of the air conditioning refrigerant measured by the temperature sensor TH24 is defined as the outlet temperature of the air conditioning heat exchanger of the intermediate heat exchanger 23, and the temperature of the hot water supply refrigerant measured by the temperature sensor TH25 is defined as the hot water supply of the intermediate heat exchanger 23. Heat exchanger outlet temperature.
In this configuration, the temperature sensor TH22 of the air-conditioning heat source side heat exchanger 24 and the temperature sensor TH23 of the hot water supply heat source side heat exchanger 44 may be omitted.
The air conditioning refrigerant flow rate adjustment valve 35c disposed in the air conditioning refrigerant inlet 24a of the air conditioning heat source side heat exchanger 24 may be a control valve (expansion valve) that is not a flow rate adjustment valve, The hot water supply refrigerant flow rate adjustment valve 49a disposed at the hot water supply refrigerant inlet 44a of the heat source side heat exchanger 44 may be a control valve (expansion valve) that is not a flow rate adjustment valve.

Then, when the exhaust heat recovery operation is performed when the air conditioning heat dissipation amount is larger than the hot water supply heat absorption amount, the control device 1a sets the air conditioning hot water supply system 100 to the “second operation state” according to the procedure shown in FIG. Drive.
At this time, in step S807, the control device 1a replaces the air conditioning heat exchanger outlet temperature of the air conditioning heat source side heat exchanger 24 with the air conditioning of the intermediate heat exchanger 23 based on the data received from the temperature sensor TH24. Calculate the heat exchanger outlet temperature. In step S808, the valve opening degree of the air conditioning refrigerant flow rate adjustment valve 35a1 is set so that the air conditioning heat exchanger outlet temperature of the intermediate heat exchanger 23 becomes the calculated target condensation temperature “Tc”.
As a result, the air conditioning refrigerant can be circulated at a flow rate suitable for the intermediate heat exchanger 23 having a small flow path resistance with respect to the air conditioning refrigerant, thereby preventing an increase in flow resistance and causing a phenomenon such as blockage of the flow. Can be prevented.

Further, when the exhaust heat recovery operation is performed when the hot water supply heat absorption amount is larger than the air conditioning heat dissipation amount, the control device 1a sets the air conditioning hot water supply system 100 to the “third operation state” according to the procedure shown in FIG. Perform recovery operation.
At this time, in step S907, the control device 1a replaces the hot water supply heat exchanger outlet temperature of the hot water supply heat source side heat exchanger 44 with the hot water supply of the intermediate heat exchanger 23 based on the data received from the temperature sensor TH25. Calculate the heat exchanger outlet temperature. In step S908, the valve opening degree of the hot water supply refrigerant flow rate adjustment valve 49b1 is set so that the hot water supply heat exchanger outlet temperature of the intermediate heat exchanger 23 becomes the calculated target evaporation temperature “Te”.
Accordingly, the hot water supply refrigerant can be circulated at a flow rate suitable for the intermediate heat exchanger 23 having a small flow path resistance with respect to the hot water supply refrigerant. Then, all of the hot water supply refrigerant can be evaporated by the intermediate heat exchanger 23 and the hot water supply heat source side heat exchanger 44. Further, in the intermediate heat exchanger 23, desired air conditioning refrigerant and hot water supply refrigerant can be used. The amount of heat can be heat exchanged.

1a Control device 5 Refrigerant circuit for air conditioning 6 Refrigerant circuit for hot water supply 23 Intermediate heat exchanger 23a Cooling air conditioning refrigerant inlet (second air conditioning refrigerant inlet)
23b Cooling air-conditioning refrigerant outlet (second air-conditioning refrigerant outlet)
23c Hot water supply refrigerant inlet (second hot water supply refrigerant inlet)
23d Hot water supply refrigerant outlet (second hot water supply refrigerant outlet)
24 Heat source side heat exchanger for air conditioning 24a Air conditioning refrigerant inlet for cooling (first air conditioning refrigerant inlet)
24b Cooling air conditioning refrigerant outlet (first air conditioning refrigerant outlet)
35c Air conditioning refrigerant flow rate adjustment valve (air conditioning refrigerant inflow adjusting means, air conditioning refrigerant shut-off means)
35a1 Air conditioning refrigerant flow rate adjustment valve (air conditioning refrigerant inflow adjusting means)
44 Heat source side heat exchanger for hot water supply 44a Hot water supply refrigerant inlet (first hot water supply refrigerant inlet)
44b Hot water supply refrigerant outlet (first hot water supply refrigerant outlet)
49a Hot water supply refrigerant flow rate adjustment valve (hot water supply refrigerant inflow adjustment means, hot water supply refrigerant shut-off means)
49b1 Hot water supply refrigerant flow rate adjustment valve (hot water supply refrigerant flow rate adjusting means)
100 Air-conditioning hot-water supply system TH22, TH24 Temperature sensor (Measuring unit for air-conditioner outlet temperature)
TH23, TH25 temperature sensor (heat exchanger outlet temperature measurement means for hot water supply)

Claims (10)

An air conditioning refrigerant circuit in which an air conditioning refrigerant circulates to form an air conditioning cycle, a hot water supply refrigerant to circulate to form a hot water supply cycle, and a control device,
Heat exchange between the air-conditioning heat source side heat exchanger in the air-conditioning refrigerant circuit and the air in parallel with the air-conditioning heat source side heat exchanger and heat exchange between the hot-water supply refrigerant and the air in the hot-water supply refrigerant circuit An air conditioning hot water supply system comprising an intermediate heat exchanger connected in parallel with the heat source side heat exchanger for hot water supply to exchange heat between the air conditioning refrigerant and the hot water supply refrigerant,
An air conditioning refrigerant inflow adjusting means for adjusting an inflow of the air conditioning refrigerant to the air conditioning heat source side heat exchanger or the intermediate heat exchanger during cooling operation in the air conditioning cycle;
Of the air-conditioning heat source side heat exchanger and the intermediate heat exchanger, one of the air-conditioning heat exchanger outlets that measures the temperature of the air-conditioning heat exchanger outlet in which the inflow amount of the air-conditioning refrigerant is adjusted during the cooling operation. Temperature measuring means,
The air conditioning refrigerant inflow adjustment means is an air conditioning refrigerant flow rate adjustment valve,
As a configuration in which the flow path resistance for the air conditioning refrigerant of the heat source side heat exchanger for air conditioning is smaller than the flow path resistance for the air conditioning refrigerant of the intermediate heat exchanger,
The air conditioning refrigerant flow rate adjustment valve is provided at a first air conditioning refrigerant inlet that serves as an inlet of the air conditioning refrigerant to the air conditioning heat source side heat exchanger during the cooling operation, and further, the air conditioning heat exchanger outlet temperature A measuring means is provided in the vicinity of the first air conditioning refrigerant outlet serving as the air conditioning refrigerant outlet from the air conditioning heat source side heat exchanger during the cooling operation,
The controller is
When performing the cooling operation in the air conditioning cycle and the hot water supply operation in the hot water supply cycle at the same time,
Calculating an air-conditioning heat radiation amount in the air-conditioning refrigerant circuit, a hot-water supply heat absorption amount in the hot-water supply refrigerant circuit, a target condensation temperature in the air-conditioning refrigerant circuit, and a target evaporation temperature in the hot-water supply refrigerant circuit;
When the air conditioning heat dissipation amount is larger than the hot water supply heat absorption amount,
The hot water supply refrigerant shut-off means blocks the flow of the hot water supply refrigerant into the hot water supply heat source side heat exchanger, and the valve opening degree of the air conditioning refrigerant flow rate adjustment valve is controlled based on the outlet temperature of the air conditioning heat exchanger. adjusted to, air-conditioning hot-water supply system and adjusting the flow rate of the air conditioning refrigerant to the air-conditioning heat source side heat exchanger. An air conditioning refrigerant circuit in which an air conditioning refrigerant circulates to form an air conditioning cycle, a hot water supply refrigerant to circulate to form a hot water supply cycle, and a control device,
Heat exchange between the air-conditioning heat source side heat exchanger in the air-conditioning refrigerant circuit and the air in parallel with the air-conditioning heat source side heat exchanger and heat exchange between the hot-water supply refrigerant and the air in the hot-water supply refrigerant circuit An air conditioning hot water supply system comprising an intermediate heat exchanger connected in parallel with the heat source side heat exchanger for hot water supply to exchange heat between the air conditioning refrigerant and the hot water supply refrigerant,
An air conditioning refrigerant inflow adjusting means for adjusting an inflow of the air conditioning refrigerant to the air conditioning heat source side heat exchanger or the intermediate heat exchanger during cooling operation in the air conditioning cycle;
Of the air-conditioning heat source side heat exchanger and the intermediate heat exchanger, one of the air-conditioning heat exchanger outlets that measures the temperature of the air-conditioning heat exchanger outlet in which the inflow amount of the air-conditioning refrigerant is adjusted during the cooling operation. Temperature measuring means,
The air conditioning refrigerant inflow adjustment means is an air conditioning refrigerant flow rate adjustment valve,
As a configuration in which the flow path resistance for the air conditioning refrigerant of the heat source side heat exchanger for air conditioning is smaller than the flow path resistance for the air conditioning refrigerant of the intermediate heat exchanger,
The air conditioning refrigerant flow rate adjustment valve is provided at a first air conditioning refrigerant inlet that serves as an inlet of the air conditioning refrigerant to the air conditioning heat source side heat exchanger during the cooling operation, and further, the air conditioning heat exchanger outlet temperature A measuring means is provided in the vicinity of the first air conditioning refrigerant outlet serving as the air conditioning refrigerant outlet from the air conditioning heat source side heat exchanger during the cooling operation,
The controller is
When performing the cooling operation in the air conditioning cycle and the hot water supply operation in the hot water supply cycle at the same time,
Calculating an air-conditioning heat radiation amount in the air-conditioning refrigerant circuit, a hot-water supply heat absorption amount in the hot-water supply refrigerant circuit, a target condensation temperature in the air-conditioning refrigerant circuit, and a target evaporation temperature in the hot-water supply refrigerant circuit;
When the air conditioning heat dissipation amount is larger than the hot water supply heat absorption amount,
The hot water supply refrigerant shut-off means blocks the flow of the hot water supply refrigerant into the hot water supply heat source side heat exchanger, and the valve opening degree of the air conditioning refrigerant flow rate adjustment valve is controlled based on the outlet temperature of the air conditioning heat exchanger. adjusted to, you wherein air-conditioning heat exchanger outlet temperature to adjust the flow rate of the air conditioning refrigerant to the air-conditioning heat source side heat exchanger so that the target condensation temperature air conditioning hot-water supply system. An air conditioning refrigerant circuit in which an air conditioning refrigerant circulates to form an air conditioning cycle, a hot water supply refrigerant to circulate to form a hot water supply cycle, and a control device,
Heat exchange between the air-conditioning heat source side heat exchanger in the air-conditioning refrigerant circuit and the air in parallel with the air-conditioning heat source side heat exchanger and heat exchange between the hot-water supply refrigerant and the air in the hot-water supply refrigerant circuit An air conditioning hot water supply system comprising an intermediate heat exchanger connected in parallel with the heat source side heat exchanger for hot water supply to exchange heat between the air conditioning refrigerant and the hot water supply refrigerant,
An air conditioning refrigerant inflow adjusting means for adjusting an inflow of the air conditioning refrigerant to the air conditioning heat source side heat exchanger or the intermediate heat exchanger during cooling operation in the air conditioning cycle;
Of the air-conditioning heat source side heat exchanger and the intermediate heat exchanger, one of the air-conditioning heat exchanger outlets that measures the temperature of the air-conditioning heat exchanger outlet in which the inflow amount of the air-conditioning refrigerant is adjusted during the cooling operation. Temperature measuring means,
The air conditioning refrigerant inflow adjustment means is an air conditioning refrigerant flow rate adjustment valve,
As a configuration in which the flow path resistance of the intermediate heat exchanger with respect to the air conditioning refrigerant is smaller than the flow path resistance of the air conditioning heat source side heat exchanger with respect to the air conditioning refrigerant,
The air conditioning refrigerant flow rate adjustment valve is provided at a second air conditioning refrigerant inlet that serves as an inlet of the air conditioning refrigerant to the intermediate heat exchanger during the cooling operation, and further includes an air conditioning heat exchanger outlet temperature measuring means. , In the vicinity of the second air conditioning refrigerant outlet serving as the outlet of the air conditioning refrigerant from the intermediate heat exchanger during the cooling operation,
The controller is
When performing the cooling operation in the air conditioning cycle and the hot water supply operation in the hot water supply cycle at the same time,
Calculating an air-conditioning heat radiation amount in the air-conditioning refrigerant circuit, a hot-water supply heat absorption amount in the hot-water supply refrigerant circuit, a target condensation temperature in the air-conditioning refrigerant circuit, and a target evaporation temperature in the hot-water supply refrigerant circuit;
When the air conditioning heat dissipation amount is larger than the hot water supply heat absorption amount,
The hot water supply refrigerant shut-off means blocks the flow of the hot water supply refrigerant into the hot water supply heat source side heat exchanger, and the valve opening degree of the air conditioning refrigerant flow rate adjustment valve is controlled based on the outlet temperature of the air conditioning heat exchanger. An air conditioning hot water supply system that adjusts and adjusts an inflow amount of the air conditioning refrigerant to the intermediate heat exchanger. An air conditioning refrigerant circuit in which an air conditioning refrigerant circulates to form an air conditioning cycle, a hot water supply refrigerant to circulate to form a hot water supply cycle, and a control device,
Heat exchange between the air-conditioning heat source side heat exchanger in the air-conditioning refrigerant circuit and the air in parallel with the air-conditioning heat source side heat exchanger and heat exchange between the hot-water supply refrigerant and the air in the hot-water supply refrigerant circuit An air conditioning hot water supply system comprising an intermediate heat exchanger connected in parallel with the heat source side heat exchanger for hot water supply to exchange heat between the air conditioning refrigerant and the hot water supply refrigerant,
An air conditioning refrigerant inflow adjusting means for adjusting an inflow of the air conditioning refrigerant to the air conditioning heat source side heat exchanger or the intermediate heat exchanger during cooling operation in the air conditioning cycle;
Of the air-conditioning heat source side heat exchanger and the intermediate heat exchanger, one of the air-conditioning heat exchanger outlets that measures the temperature of the air-conditioning heat exchanger outlet in which the inflow amount of the air-conditioning refrigerant is adjusted during the cooling operation. Temperature measuring means,
The air conditioning refrigerant inflow adjustment means is an air conditioning refrigerant flow rate adjustment valve,
As a configuration in which the flow path resistance of the intermediate heat exchanger with respect to the air conditioning refrigerant is smaller than the flow path resistance of the air conditioning heat source side heat exchanger with respect to the air conditioning refrigerant,
The air conditioning refrigerant flow rate adjustment valve is provided at a second air conditioning refrigerant inlet that serves as an inlet of the air conditioning refrigerant to the intermediate heat exchanger during the cooling operation, and further includes an air conditioning heat exchanger outlet temperature measuring means. , In the vicinity of the second air conditioning refrigerant outlet serving as the outlet of the air conditioning refrigerant from the intermediate heat exchanger during the cooling operation,
The controller is
When performing the cooling operation in the air conditioning cycle and the hot water supply operation in the hot water supply cycle at the same time,
Calculating an air-conditioning heat radiation amount in the air-conditioning refrigerant circuit, a hot-water supply heat absorption amount in the hot-water supply refrigerant circuit, a target condensation temperature in the air-conditioning refrigerant circuit, and a target evaporation temperature in the hot-water supply refrigerant circuit;
When the air conditioning heat dissipation amount is larger than the hot water supply heat absorption amount,
The hot water supply refrigerant shut-off means blocks the flow of the hot water supply refrigerant into the hot water supply heat source side heat exchanger, and the valve opening degree of the air conditioning refrigerant flow rate adjustment valve is controlled based on the outlet temperature of the air conditioning heat exchanger. An air conditioning and hot water supply system that adjusts and adjusts an inflow amount of the air conditioning refrigerant to the intermediate heat exchanger so that an outlet temperature of the air conditioning heat exchanger becomes the target condensation temperature. During hot water supply operation in the hot water supply cycle, a hot water supply refrigerant inflow amount adjusting means for adjusting an inflow amount of the hot water supply refrigerant into the hot water supply heat source side heat exchanger or the intermediate heat exchanger;
Of the hot water supply heat source side heat exchanger and the intermediate heat exchanger, the hot water supply heat exchanger outlet that measures the temperature of one of the hot water supply heat exchangers to which the inflow amount of the hot water supply refrigerant is adjusted during the hot water supply operation A temperature measuring means,
The controller is
When performing the cooling operation in the air conditioning cycle and the hot water supply operation in the hot water supply cycle simultaneously, when the hot water supply heat absorption amount is larger than the air conditioning heat dissipation amount,
The air conditioning refrigerant shut-off means shuts off the inflow of the air-conditioning refrigerant to the air-conditioning heat source side heat exchanger, and controls the hot water supply refrigerant inflow amount adjusting means based on the outlet temperature of the hot water supply heat exchanger. The inflow amount of the hot water supply refrigerant into the hot water supply heat source side heat exchanger or the intermediate heat exchanger is adjusted. 5. The air conditioning hot water supply system described in 1. The controller is
The inflow amount of the hot water supply refrigerant to the hot water supply heat source side heat exchanger or the intermediate heat exchanger is adjusted so that the outlet temperature of the hot water supply heat exchanger becomes the target evaporation temperature. The air-conditioning hot-water supply system according to claim 5 . The hot water supply refrigerant inflow adjustment means is a hot water supply refrigerant flow rate adjustment valve,
As a configuration in which the flow path resistance for the hot water supply refrigerant of the hot water supply heat source side heat exchanger is smaller than the flow path resistance for the hot water supply refrigerant of the intermediate heat exchanger,
The hot water supply refrigerant flow rate adjustment valve is provided at a first hot water supply refrigerant inlet serving as an inlet of the hot water supply refrigerant to the hot water supply heat source side heat exchanger during the hot water supply operation, and further, the hot water supply heat exchanger outlet temperature A measuring means is provided in the vicinity of a first hot water supply refrigerant outlet serving as an outlet of the hot water supply refrigerant from the hot water supply heat source side heat exchanger during the hot water supply operation,
The control device adjusts an inflow amount of the hot water supply refrigerant to the hot water supply heat source side heat exchanger by adjusting a valve opening degree of the hot water supply refrigerant flow rate adjustment valve. 6. The air conditioning and hot water supply system according to item 5 . The hot water supply refrigerant inflow adjustment means is a hot water supply refrigerant flow rate adjustment valve,
As a configuration in which the flow path resistance for the hot water supply refrigerant of the hot water supply heat source side heat exchanger is smaller than the flow path resistance for the hot water supply refrigerant of the intermediate heat exchanger,
The hot water supply refrigerant flow rate adjustment valve is provided at a first hot water supply refrigerant inlet serving as an inlet of the hot water supply refrigerant to the hot water supply heat source side heat exchanger during the hot water supply operation, and further, the hot water supply heat exchanger outlet temperature A measuring means is provided in the vicinity of a first hot water supply refrigerant outlet serving as an outlet of the hot water supply refrigerant from the hot water supply heat source side heat exchanger during the hot water supply operation,
The control device adjusts an inflow amount of the hot water supply refrigerant to the hot water supply heat source side heat exchanger by adjusting a valve opening degree of the hot water supply refrigerant flow rate adjustment valve. The air conditioning and hot water supply system according to item 6 . The hot water supply refrigerant inflow adjustment means is a hot water supply refrigerant flow rate adjustment valve,
As a configuration in which the flow path resistance for the hot water supply refrigerant of the intermediate heat exchanger is smaller than the flow path resistance for the hot water supply refrigerant of the hot water supply heat source side heat exchanger,
The hot water supply refrigerant flow rate adjustment valve is provided in a second hot water supply refrigerant inlet that serves as an inlet of the hot water supply refrigerant to the intermediate heat exchanger during the hot water supply operation, and further, the hot water supply heat exchanger outlet temperature measuring means is provided. , In the vicinity of a second hot water supply refrigerant outlet serving as an outlet of the hot water supply refrigerant from the intermediate heat exchanger during the hot water supply operation,
Wherein the control unit adjusts the valve opening degree of the hot water supply refrigerant flow control valve, the range fifth preceding claims, characterized in that for adjusting the flow rate of the hot water supply refrigerant to the intermediate heat exchanger The air conditioning hot water supply system described. The hot water supply refrigerant inflow adjustment means is a hot water supply refrigerant flow rate adjustment valve,
As a configuration in which the flow path resistance for the hot water supply refrigerant of the intermediate heat exchanger is smaller than the flow path resistance for the hot water supply refrigerant of the hot water supply heat source side heat exchanger,
The hot water supply refrigerant flow rate adjustment valve is provided in a second hot water supply refrigerant inlet that serves as an inlet of the hot water supply refrigerant to the intermediate heat exchanger during the hot water supply operation, and further, the hot water supply heat exchanger outlet temperature measuring means is provided. , In the vicinity of a second hot water supply refrigerant outlet serving as an outlet of the hot water supply refrigerant from the intermediate heat exchanger during the hot water supply operation,
The range of claim 6 , wherein the controller adjusts the flow rate of the hot water supply refrigerant into the intermediate heat exchanger by adjusting a valve opening degree of the hot water supply refrigerant flow rate adjustment valve. The air conditioning hot water supply system described.

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